Bed-spring.



C. D. KARR.

BE D SPRING. APPLICATION man AUG-22, 19x2.

'7 6 1 Patented Feb. 26, 1918.

CHARLES D. KARE, 0F HOLLAND, MICHIGAN.

BED-SPRING.

Specification of Letters Patent.

Patented Feb. 28, 1818.

Application filed August 22, 1917. Serial No. 187,696.

To all whom it may concern:

Be it known that 1, CHARLES D. KARR, a citizen of the United States,residing at Hol land, county of Ottawa, and State of Michigan, haveinvented certain new and useful Improvements in Bed-Springs, of whichthe following is a specification, and which are illustrated in theaccompanying drawings, forming a part thereof.

The invention relates to built-up wire springs for spring beds, cushionsand the like and more particularly to those which comprise a series ofupright coil springs. The invention has special reference to the mannerof connecting the surface turns of adjacent coil springs, the object ofthe invention being to provide a construction in which the parts may bereadily assembled while the full rangejof relative movement between theparts is permitted by the flexing of the connecting elements and withoutfrictional movement of one part upon another.

In the accompanying drawings,

Figure 1 is a plan view showing details of the surface turns of twoadjacent upright coil. springs, the said parts being connected inthetmanner provided by the invention.

Fig. 2 is similar to Fig. 1 but illustrates one of the relativepositions of the parts while being assembled, and

Fig. 3 is also similar to Fig. 1, but shows a modified construction.

The drawings illustrate details of two wire rings 1011 and 12-13. Theserings may be the surface turns of two adjacent upright coils of a bedspring or the like. Preferably the adjacent sides of the two rings haveoilset portions providing dents or shoulders 14-15 or 16 -17. Incarrying out the invention a helical spring 18 or 19 is employed as theonly connecting element between the two rings 1011 or 12-13.

Preferably the bore ofthe helical spring 18 or 19 is'of substantiallythe same diameter as the wire from which the corresponding rings 10'11or 12-13 are formed. it therefore follows that if the helical spring 18or 19 has its opposite ends interwoven with the two rings 10-11 or12-:-13 in such manner as to have telescopic engagement with the sidesof the ring, a flexible but permanent connection is provided between thesaid parts;

In the form of construction illustrated in Figs. 1 and 2 the oflsetportions 14 and 15 of the rings 10--11 extend in approximately radialdirections and the two ends of the connecting helical spring 18 areinterwoven with these ofi'set portions of the sides of the rings. Theconnecting helical spring 18 accordingly extends in a slightly inclinedposition between the rings. In assembling the parts one end, as 20, ofthe helical spring .18 is engaged with the side of the ring 10 at theouter end of the ofiset portion and the spring 18 is rotated to threadits coils along the offset portion 14 until the'said spring extends fora substantial distance beyond the inner end of the offset portion 14.The other end, as 21, of the spring 18 is then engaged with the side ofthe ring 11 at the outer end of the ofl set portion 15. The spring 18 isnow rotated in the opposite direction until the end 20 has been returnedto a position adjacent the inner end of the offset portion 14. At thistime'the end 21 of the spring 18 will have reached the inner end of theofiset portion 15 of the ring 11 and a permanent connection of the tworings has been obtained.

In the form of construction illustrated in Fig. 3 the two ends of theconnecting helical spring 19 have telescopic engagement with the sidesof the rings12 and 13, at opposite sides of the two'ofi'set portions 16and 17. The method of application ofthe connecting helical spring is thesame as that employed with the construction illustrated in Figs. 1 and 2except that the connecting helical spring 19 is first threaded over theside of one of the rings, as 12, through a greater distance than isrequired in the finished construction. Thereafter the other end of theconnecting helical spring 19 is engaged with the side of the other ring13, immediately beyond the shoulder 17 and the spring is partlywithdrawn from the side of the ring 12. This application of the spring19 to the rings 12 and 13 is accomplished by rotating the spring 19successively in opposite directions, as heretofore explained indescribing the application of the helical spring 18 to the chestportions 1415 of the rings .10'11.

When either form of construction is employed a full range of relativemovement between the two adjacent rings 1'0*11 or 12--13, in anydirection, is permitted by the construction is both efi'ective andnoiseless in service.

I claim as my invention: 1. In a spiral spring bed bottom, spiralsprings having large surface coils, abrupt ofl'sets formed in, andpractically at right angles with said surface coils, and helical springsinterwoven with said ofi'sets formmg a diagonally located flexibleconnecting element between said coils.

2. In combination with the broad surface coils of a spiral spring bedbottom, oflsets formed in said coils to produce straight bodies standingat an incline from the circle of the coils, and helical springs entwinedover and around said bodies to form connectino' elements diagonally fromone coil to anot er.

3. In combination with the broad surface coils of a spiral spring bedbottom, long radial offsets integrally formed in the outer coils, andsmall helical springs interwoven with the offsets of adjacent coilsforming a free flexible connection between the surface coils.

4. In a bed spring, in combination, a pair of horizontal wire ringsbeing the ends of two upright coil springs, and a helical springextending between and flexibly connecting the two rings, the bore of thehelical spring being substantially of the same size as the wire fromwhich the rings are formed and a substantial length of the helicalspring immediately adjacent each end of the same being telescoped uponthe side of the correspondin wire ring.

5. In a (1 spring, in combination, a pair of horizontal wire rings beingthe ends/of two upright coil springs, adjacent portions of the ringsbeing formed with ofi'sets providing oppositely facing shoulders in thesides of the two rings, anda helical spring extending between andflexibly connecting the rings, the bore of the helical spring be- I ingsubstantially of the same size as the wire from which the rings areformed and a substantial length of the helical spring immediatelyadjacent each end of the same being telescoped upon the side of thecorresponding ring for a distance extending to the said shoulder.

CHARLES D. KARR.

